Revert "mwifiex: cancel cmd timer and free curr_cmd in shutdown process

revert commit b9f1f48c which is commit
084c7189 upstream.

It shouldn't have been applied to the 3.4-stable tree.
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Marco Cesarano <marco@marvell.com>
Reported-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/wireless/mwifiex/init.c

@@ -584,14 +584,6 @@ mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 		return ret;
 	}
 
-	/* cancel current command */
-	if (adapter->curr_cmd) {
-		dev_warn(adapter->dev, "curr_cmd is still in processing\n");
-		del_timer(&adapter->cmd_timer);
-		mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);
-		adapter->curr_cmd = NULL;
-	}
-
 	/* shut down mwifiex */
 	dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");